var arr = new Array(1, 2, 3, 4, 5, 6)
// forEach fastest
arr.forEach((i) => console.log(i))

// for 39% slower
for (var i = arr.length; i; i--) {
  console.log(arr[i])
}

// for...in 41% slower
for (var i in arr) {
  console.log(arr[i])
}
